import { hilog } from '@kit.PerformanceAnalysisKit';
import { WidgetData } from './WidgetTypes';
import { AvSessionWidgetListener } from './AvSessionWidgetListener';

const TAG = 'GlobalWidgetService';

/**
 * 全局卡片服务
 * 用于主应用直接更新卡片数据，绕过跨进程通信限制
 */
export class GlobalWidgetService {
  private static instance: GlobalWidgetService | null = null;
  private avSessionListener: AvSessionWidgetListener;

  private constructor() {
    this.avSessionListener = AvSessionWidgetListener.getInstance();
  }

  public static getInstance(): GlobalWidgetService {
    if (!GlobalWidgetService.instance) {
      GlobalWidgetService.instance = new GlobalWidgetService();
    }
    return GlobalWidgetService.instance;
  }

  /**
   * 更新卡片数据（主应用调用）
   */
  public updateWidgetData(data: WidgetData): void {
    try {
      // 在全局服务层面也进行按钮状态验证和修复
      const correctedData = this.validateAndFixButtonStates(data);
      
      // 更新AvSession监听器的数据
      this.avSessionListener.updateWidgetData(correctedData);
      
      hilog.info(0x0000, TAG, `Widget data updated globally: isPlaying=${correctedData.playState.isPlaying}, title=${correctedData.currentSong.title}, hasNext=${correctedData.playlist.hasNext}, hasPrevious=${correctedData.playlist.hasPrevious}, currentIndex=${correctedData.playlist.currentIndex}, totalCount=${correctedData.playlist.totalCount}`);
    } catch (error) {
      hilog.error(0x0000, TAG, `Failed to update widget data globally: ${error}`);
    }
  }

  /**
   * 验证和修复按钮状态
   */
  private validateAndFixButtonStates(data: WidgetData): WidgetData {
    hilog.info(0x0000, TAG, `Validating button states: original hasNext=${data.playlist.hasNext}, hasPrevious=${data.playlist.hasPrevious}, currentIndex=${data.playlist.currentIndex}, totalCount=${data.playlist.totalCount}`);
    
    // 创建新的 WidgetData 对象
    const correctedData: WidgetData = {
      playState: {
        isPlaying: data.playState.isPlaying,
        isPaused: data.playState.isPaused,
        isLoading: data.playState.isLoading
      },
      currentSong: {
        id: data.currentSong.id,
        title: data.currentSong.title,
        artist: data.currentSong.artist,
        album: data.currentSong.album,
        coverImagePath: data.currentSong.coverImagePath,
        duration: data.currentSong.duration
      },
      progress: {
        currentPosition: data.progress.currentPosition,
        duration: data.progress.duration,
        percentage: data.progress.percentage,
        currentTimeText: data.progress.currentTimeText,
        totalTimeText: data.progress.totalTimeText
      },
      playlist: {
        hasNext: data.playlist.hasNext,
        hasPrevious: data.playlist.hasPrevious,
        currentIndex: data.playlist.currentIndex,
        totalCount: data.playlist.totalCount
      },
      config: {
        size: data.config.size,
        theme: data.config.theme,
        showProgress: data.config.showProgress,
        showCover: data.config.showCover
      }
    };
    
    if (data.playlist.totalCount > 1) {
      const correctHasNext = data.playlist.currentIndex < data.playlist.totalCount - 1;
      const correctHasPrevious = data.playlist.currentIndex > 0;
      
      // 更新按钮状态
      correctedData.playlist.hasNext = correctHasNext;
      correctedData.playlist.hasPrevious = correctHasPrevious;
      
      if (correctHasNext !== data.playlist.hasNext || correctHasPrevious !== data.playlist.hasPrevious) {
        hilog.info(0x0000, TAG, `Fixed button states in GlobalWidgetService: hasNext=${correctHasNext}, hasPrevious=${correctHasPrevious}`);
      }
    } else {
      // 单首歌或无歌曲时，禁用所有按钮
      correctedData.playlist.hasNext = false;
      correctedData.playlist.hasPrevious = false;
    }
    
    return correctedData;
  }
}